Ammonia water spraying device for cement production line kiln tail flue gas denitration
By designing an ammonia water injection device that includes an exhaust stack, an inlet pipe, an outlet pipe, and a U-shaped pipe, and using a servo motor and a solenoid valve to control the intermittent delivery and atomization of ammonia water, the problem of large ammonia water consumption is solved, achieving efficient flue gas denitrification and cost reduction.
Patent Information
- Application Number
- CN202420341105.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-02-23
AI Technical Summary
In existing cement production line kiln tail flue gas denitrification devices, the ammonia water atomization space is small, resulting in a large amount of ammonia water used and high costs.
An ammonia water injection device was designed, comprising an exhaust stack, an inlet pipe, an outlet pipe, a U-shaped pipe, and an atomizing nozzle. By controlling the rotation of the liquid pipe and the opening and closing of the solenoid valve through a servo motor, the ammonia water is intermittently delivered and atomized, forming an ammonia water atomization space of about two meters, thereby reducing the amount of ammonia water used.
It improved the denitrification effect of flue gas, reduced the amount of ammonia water used, and lowered production costs.
Smart Images
Figure CN222305363U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of kiln tail flue gas treatment, in particular to an ammonia water injection device for denitrification of kiln tail flue gas in a cement production line. Background Art
[0002] In the cement production process, a large amount of toxic flue gas is generated, which contains a large amount of nitrogen oxide tail gas. Direct discharge will cause serious pollution to the natural environment. Therefore, it is necessary to denitrify the tail gas. Therefore, an ammonia injection device will be installed inside the exhaust pipe of the kiln tail flue gas to spray ammonia inside the exhaust pipe to neutralize the nitrogen oxides. However, in the prior art, basically a pipe for conveying ammonia water is fixed in the exhaust pipe, and ammonia water is atomized by several atomizing nozzles. The atomized ammonia water is downward. In this technology, the atomization space formed by ammonia water is small. At the same time, ammonia water needs to be continuously conveyed, and the amount of ammonia water used is large, and the production cost is high.
[0003] Therefore, it is necessary to provide a new ammonia water injection device for denitrification of flue gas at the kiln tail of a cement production line to solve the above technical problems. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides an ammonia water injection device for denitrification of flue gas at the tail of a cement production line.
[0005] The utility model provides an ammonia water injection device for denitrification of flue gas at the tail of a cement production line, comprising:
[0006] An exhaust pipe, a liquid inlet pipe is fixedly installed in the middle of the exhaust pipe, a liquid outlet pipe is fixedly installed at a position on the exhaust pipe corresponding to the liquid inlet pipe, the ammonia water discharged from the liquid outlet pipe is connected to the ammonia water storage tank, and a liquid pipe is sealed and rotatably installed between the liquid inlet pipe and the liquid outlet pipe;
[0007] The U-shaped tube is fixedly installed on the outside of the liquid tube in a circular array with the central axis of the liquid tube as the axis. The U-shaped tube is connected to the liquid tube. Atomizing nozzles are fixedly installed at equal intervals in the middle of the U-shaped tube. When the liquid tube rotates, the U-shaped tube is intermittently connected to the liquid tube, and ammonia water can intermittently enter the U-shaped tube.
[0008] Preferably, the installation angles of the plurality of atomizing nozzles are different.
[0009] Preferably, fixing frames are fixedly installed inside the liquid inlet pipe and the liquid outlet pipe, and blocking blocks for blocking the U-shaped tube are installed at positions of the fixing frames corresponding to the two ends of the U-shaped tube.
[0010] Preferably, a driven gear is fixedly installed at one end of the liquid pipe, a motor is fixedly installed on the outer side of the exhaust pipe near the driven gear, a driving gear is fixedly installed at the output end of the motor through the exhaust pipe, and the driving gear is meshingly connected with the driven gear.
[0011] Preferably, a solenoid valve is fixedly installed in the middle of the liquid outlet pipe, and the opening and closing of the liquid outlet pipe by the solenoid valve matches the rotation of the liquid pipe.
[0012] Preferably, a sealing gasket is installed on the surface of the blocking block.
[0013] Preferably, the motor is a servo motor.
[0014] Preferably, the length of the vertical sections at both ends of the U-shaped tube is one meter.
[0015] Compared with the prior art, the ammonia water injection device for denitrification of flue gas at the tail of the cement production line provided by the utility model has the following beneficial effects:
[0016] The utility model provides an ammonia injection device for denitrification of flue gas at the tail of a cement production line. When in use, the ammonia in the ammonia storage tank will be transported to the liquid inlet pipe through a delivery pump, and the ammonia inside the liquid inlet pipe will be transported to the inside of a U-shaped pipe through a liquid pipe. The ammonia can be atomized and sprayed out through the operation of an atomizing nozzle, forming an ammonia atomization space of about two meters inside the exhaust pipe, thereby improving the effect of denitrification treatment on the flue gas generated in the cement production line. With the operation of the motor, the blocking block will block the U-shaped pipe feed hole, and the ammonia inside the liquid pipe will enter the liquid outlet pipe for recovery of the ammonia. The exhaust pipe can be intermittently filled with ammonia, thereby reducing the amount of ammonia used and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of the ammonia water injection device for denitrification of flue gas at the kiln tail of a cement production line provided by the utility model;
[0018] Figure 2 for Figure 1 The overall explosion structure diagram shown;
[0019] Figure 3 for Figure 1 The partial cross-sectional diagram of the exploded structure is shown.
[0020] Numbers in the figure: 1, exhaust pipe; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, liquid pipe; 5, U-shaped pipe; 6, atomizing nozzle; 7, fixing frame; 8, blocking block; 9, driven gear; 10, motor; 11, driving gear; 12, solenoid valve. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.
[0023] See also Figures 1 to 3 The utility model provides an ammonia water injection device for denitrification of flue gas at the kiln tail of a cement production line, and the ammonia water injection device for denitrification of flue gas at the kiln tail of a cement production line comprises:
[0024] An exhaust pipe 1, a liquid inlet pipe 2 is fixedly installed in the middle of the exhaust pipe 1, a liquid outlet pipe 3 is fixedly installed at a position on the exhaust pipe 1 corresponding to the liquid inlet pipe 2, the ammonia water discharged by the liquid outlet pipe 3 is connected to the ammonia water storage tank, and a liquid pipe 4 is sealed and rotatably installed between the liquid inlet pipe 2 and the liquid outlet pipe 3;
[0025] A U-shaped tube 5 is fixedly installed on the outside of the liquid tube 4 in a ring array with the central axis of the liquid tube 4 as the axis. The U-shaped tube 5 is connected to the liquid tube 4. Atomizing nozzles 6 are fixedly installed at equal intervals in the middle of the U-shaped tube 5. Under the rotation of the liquid tube 4, the U-shaped tube 5 is intermittently connected to the liquid tube 4, and ammonia water can intermittently enter the U-shaped tube 5. A fixing frame 7 is fixedly installed inside the liquid inlet pipe 2 and the liquid outlet pipe 3. The fixing frame 7 is provided with a blocking block 8 for blocking the U-shaped tube 5 at the position corresponding to the two ends of the U-shaped tube 5. A driven gear 9 is fixedly installed at one end of the liquid tube 4. A motor 10 is fixedly installed at the position of the outer side of the exhaust pipe 1 near the driven gear 9. A driving gear 11 is fixedly installed at the output end of the motor 10 through the exhaust pipe 1. The driving gear 11 is meshed and connected with the driven gear 9. A solenoid valve 12 is fixedly installed in the middle of the liquid outlet pipe 3. The opening and closing of the liquid outlet pipe 3 by the solenoid valve 12 matches the rotation of the liquid pipe 4. When the device is in use, the ammonia water in the ammonia water storage tank will be transported to the liquid inlet pipe 2 through the delivery pump, and the ammonia water inside the liquid inlet pipe 2 will be transported to the inside of the U-shaped tube 5 through the liquid pipe 4. The ammonia water can be atomized and sprayed out through the operation of the atomizing nozzle 6, forming an ammonia water atomization space of about two meters inside the exhaust pipe 1, thereby improving the effect of denitrification treatment of the flue gas generated in the cement production line. With the operation of the motor 10, the blocking block 8 will block the feed hole of the U-shaped tube 5, and the ammonia water inside the liquid pipe 4 will enter the liquid outlet pipe 3 for the recovery of ammonia water. The exhaust pipe 1 can be intermittently filled with ammonia water to reduce the use of ammonia water and reduce costs.
[0026] See also Figures 1 to 3 The installation angles of the plurality of atomizing nozzles 6 are different, so that the ammonia atomization can be fully filled into the exhaust pipe 1.
[0027] See also Figures 1 to 3 The surface of the blocking block 8 is provided with a sealing pad, so as to improve the effect of the blocking block 8 in blocking the feed hole on the U-shaped tube 5.
[0028] See also Figures 1 to 3 The motor 10 is a servo motor, which can achieve precise control of the rotation accuracy of the liquid pipe 4.
[0029] See also Figures 1 to 3 The length of the vertical sections at both ends of the U-shaped tube 5 is one meter. The atomizing nozzles 6 on the four U-shaped tubes 5 can spray ammonia water in atomization mode, forming an ammonia water atomization space of about two meters inside the exhaust pipe 1, which greatly improves the denitrification treatment effect of the flue gas generated in the cement production line.
[0030] When the device is in use, the ammonia water in the ammonia water storage tank will be transported to the liquid inlet pipe 2 through the delivery pump. At this time, the solenoid valve 12 is in a closed state to the liquid outlet pipe 3, and the blocking blocks 8 installed on the liquid inlet pipe 2 and the liquid outlet pipe 3 will not block the feed hole of the U-shaped tube 5. The ammonia water inside the liquid inlet pipe 2 will be transported to the inside of the U-shaped tube 5 through the liquid pipe 4. The ammonia water can be atomized and sprayed out through the operation of the atomizing nozzle 6, forming an ammonia water atomization space of about two meters inside the exhaust pipe 1, and the flue gas generated in the cement production line can be denitrated. During this process, the motor 10 will drive the driving gear 11 to rotate, and the liquid pipe 4 will be driven to rotate at all times through the engagement of the driving gear 11 with the driven gear 9. At this time, the blocking blocks 8 installed on the liquid inlet pipe 2 and the liquid outlet pipe 3 will block the feed hole of the U-shaped tube 5. At this time, the solenoid valve 12 is in an open state to the liquid outlet pipe 3, and the ammonia water inside the liquid pipe 4 will enter the liquid outlet pipe 3 for the recovery of ammonia water.
[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An ammonia water injection device for denitrification of flue gas at the tail of a cement production line, characterized in that: include: An exhaust pipe (1), a liquid inlet pipe (2) is fixedly mounted in the middle of the exhaust pipe (1), a liquid outlet pipe (3) is fixedly mounted at a position on the exhaust pipe (1) corresponding to the position of the liquid inlet pipe (2), ammonia water discharged from the liquid outlet pipe (3) is connected to an ammonia water storage tank, and a liquid pipe (4) is sealed and rotatably mounted between the liquid inlet pipe (2) and the liquid outlet pipe (3); The U-shaped tubes (5) are fixedly mounted on the outside of the liquid tube (4) in a circular array with the central axis of the liquid tube (4) as the axis. The U-shaped tubes (5) are connected to the liquid tube (4). Atomizing nozzles (6) are fixedly mounted at equal intervals in the middle of the U-shaped tubes (5). When the liquid tube (4) rotates, the U-shaped tubes (5) are intermittently connected to the liquid tube (4), and ammonia water can intermittently enter the U-shaped tubes (5).
2. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 1 is characterized in that: The installation angles of the plurality of atomizing nozzles (6) are different.
3. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 1 is characterized in that: A fixing frame (7) is fixedly installed inside the liquid inlet pipe (2) and the liquid outlet pipe (3), and blocking blocks (8) for blocking the U-shaped tube (5) are installed at positions of the fixing frame (7) corresponding to the two ends of the U-shaped tube (5).
4. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 1 is characterized in that: A driven gear (9) is fixedly mounted on one end of the liquid pipe (4); a motor (10) is fixedly mounted on the outer side of the exhaust pipe (1) near the driven gear (9); a driving gear (11) is fixedly mounted on the output end of the motor (10) through the exhaust pipe (1); and the driving gear (11) is meshingly connected with the driven gear (9).
5. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 1 is characterized in that: A solenoid valve (12) is fixedly mounted in the middle of the liquid outlet pipe (3), and the opening and closing of the liquid outlet pipe (3) by the solenoid valve (12) matches the rotation of the liquid pipe (4).
6. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 3 is characterized in that: A sealing gasket is installed on the surface of the blocking block (8).
7. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 4 is characterized in that: The motor (10) is a servo motor.
8. The ammonia water injection device for denitrification of flue gas at the tail of a cement production line according to claim 3 is characterized in that: The length of the vertical sections at both ends of the U-shaped tube (5) is one meter.